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| United States Patent |
5,141,139
|
|
Kleeblatt
|
August 25, 1992
|
Slide gate nozzle for metallurgical vessels
Abstract
A sliding gate valve for metallurgical vessels, such as pouring ladles, is
disclosed. The sliding gate valve may include a slide gate housing
fastenable to a melt-containing vessel. A heat-resistant closure plate may
be held stationary by a movable slide plate pressing against the closure
plate. The slide plate may be supported in a frame having two sets of
rollers. The frame may be connected to a drive, for example a hydraulic or
pneumatic drive. An aperture may be provided in the housing bottom for
passage of the frame rollers therethrough. The distance corresponding to
the axial spacing between the sets of rollers is equivalent to the
distance corresponding to the axial spacing between side apertures of the
bottom aperture. The axial spacing between the rollers corresponds to the
axial spacing between the side apertures to allow for the simultaneous
passage of both sets of rollers through the side apertures. The frame may
be guided in the housing on a slide comprising side aperture closing
portions which may be displaced to open and close the side apertures of
the housing bottom. The frame and the slide may be provided with bores
that may be temporarily and rigidly connected with each other by a
connecting bolt. Each roller of one set of rollers may be equipped with a
releasable connecting bolt cooperating with a housing receptacle.
| Inventors:
|
Kleeblatt; Schmuel (Mamer, LU)
|
| Assignee:
|
Cerafer S.A.R.L. (Mamer, LU)
|
| Appl. No.:
|
664058 |
| Filed:
|
March 5, 1991 |
Foreign Application Priority Data
| Current U.S. Class: |
222/600 |
| Intern'l Class: |
B22D 041/24 |
| Field of Search: |
266/236
222/600,591,597
164/337,335
|
References Cited
U.S. Patent Documents
| 3765579 | Oct., 1973 | Cramer et al. | 222/600.
|
| Foreign Patent Documents |
| 0679316 | Aug., 1979 | SU | 222/600.
|
| 1424966 | Sep., 1988 | SU | 222/600.
|
| 2169529 | Jul., 1986 | GB | 222/600.
|
Primary Examiner: Kastler; Scott
Attorney, Agent or Firm: Koch; Robert J.
Claims
I claim:
1. A slide gate valve comprising:
a slide gate housing having a bottom aperture;
a heat-resistant closure plate located on said slide gate housing;
a movable frame having at least one set of rollers;
a slide plate contacting said closure plate and located on said movable
frame; and
a movable aperture-closing slide located along the bottom of said slide
gate housing;
wherein said bottom aperture and said movable frame are relatively sized so
said movable frame may be released through said bottom aperture.
2. A slide gate valve according to claim 1, further comprising:
detachable connecting element associated with said frame and said
aperture-closing slide.
3. A slide gate valve according to claim 1, wherein:
said bottom aperture further exhibits a plurality of sets of spaced-apart
side apertures, and
said movable frame further comprises at least a second set of rollers
axially spaced from said first set of rollers, the axial spacing of said
sets of spaced-apart side apertures corresponding to the axial spacing of
said sets of rollers.
4. A slide gate valve according to claim 2, wherein said connecting element
comprises:
a first bore located in said frame;
a second bore located in said aperture-closing slide, wherein said first
and second bores are aligned when said aperture-closing slide and said
frame are in a first position.
5. A slide gate valve according to claim 1, further comprising:
a connecting bolt connected to each roller of one set of rollers and
laterally spanning a corresponding side aperture.
6. A slide gate valve according to claim 5, further comprising:
a bolt-receiving receptacle associated with each of said bolts and located
within said slide gate housing.
7. A slide gate valve according to claim 6, wherein said connecting bolts
are releasable connecting bolts.
8. A slide gate valve according to claim 5, wherein said connecting bolts
are releasable connecting bolts.
9. A slide gate valve according to claim 1, wherein said aperture-closing
slide includes sloping ramps.
10. A slide gate valve according to claim 1, wherein said aperture-closing
slide includes a frame-guiding slide.
11. A slide gate valve comprising:
a slide gate housing having a bottom aperture;
a movable slide plate assembly exhibiting at least a first set of rollers
located within said slide gate housing; and
an aperture-closing slide located along the bottom of said slide gate
housing, wherein said aperture-closing slide is displaceable between a
first position partially blocking passage of a portion of said movable
slide plate assembly through recesses in said bottom aperture and a second
position permitting passage of a portion of said movable slide plate
assembly through said recesses.
12. A slide gate valve according to claim 11, further comprising:
detachable connecting element associated with said frame and said
aperture-closing slide.
13. A slide gate valve according to claim 11, wherein:
said bottom aperture further exhibits a plurality of sets of spaced-apart
recesses, and
said movable slide plate assembly further comprises a second set of
rollers, wherein the axial spacing of said spaced-apart recesses
corresponds to the axial spacing between said first and second sets of
rollers.
14. A slide gate valve according to claim 12, wherein said connecting
element comprises:
a first bore located in said frame;
a second bore located in said aperture-closing slide, wherein said first
and second bores are aligned when said aperture-closing slide and said
frame are in a first position.
15. A slide gate valve according to claim 11, further comprising:
a connecting bolt connected to each roller of said first set of rollers and
laterally spanning a corresponding recess.
16. A slide gate valve according to claim 15, further comprising:
a bolt-receiving receptacle associated with each of said bolts and located
within said slide gate housing.
17. A slide gate valve according to claim 16, wherein said connecting bolts
are releasable connecting bolts.
18. A slide gate valve according to claim 15, wherein said connecting bolts
are releasable connecting bolts.
19. A slide gate valve according to claim 11, wherein said aperture-closing
slide includes sloping ramps.
20. A slide gate valve according to claim 11, wherein said aperture-closing
slide includes a frame-guiding slide.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a slide gate nozzle or valve for metallurgical
vessels, in particular, a slide gate valve having a slide valve housing
fastened to a melt-containing vessel, with a frame supported on two sets
of rollers and having an opening provided in the housing bottom for
passage of the rollers therethrough.
2. Description of the Related Technology
International Application WO88/01211 discloses a known slide gate valve in
which the frame may be moved by a drive unit into a position outside the
closed state, so the plate may be removed. According to the known slide
gate valve, one of the two sets of rollers enters a depressed bearing
trough, thus relieving the pressure applied to the slide in the operating
position. The frame can then be released from the drive unit and after
pivoting the frame, the used plate may be replaced.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a slide gate valve
where it is possible to replace the plate or other mechanical parts of the
slide gate valve in a simple manner.
According to the invention, this object may be attained by providing a
slide gate valve having a slide gate housing with a bottom aperture, a
heat-resistant closure plate, a slide plate and a movable aperture-closing
slide.
A slide gate valve according to the invention makes it possible to replace
the used slide plates in a simple manner, i.e., without disassembling the
housing and without removing the assembly from the operating position,
and, if necessary, also to replace the entire frame, without having to
disassemble the slide valve housing. It is merely necessary to displace
the slide carrying the frame until the openings or side apertures in the
housing bottom are uncovered, and through which the frame may be removed
from the housing and reinserted following the replacement of the damaged
parts.
Further embodiments and advantages will become apparent from the following
description of the preferred embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic view in section through a slide gate valve
according to the invention in the open position,
FIG. 2 shows the slide gate valve of FIG. 1 in the closed position,
FIG. 3 shows the slide gate valve with the frame pivoted out one-half of
the possible distance, and
FIG. 4 shows the slide gate valve in its position prior to the removal of
the slide.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIGS. 1-4 show a slide gate valve according to the invention including a
slide gate housing having a cover part 2 and a bottom part 3. The slide
gate housing may be fastened to vessel 1. A closure plate 4, preferably
made of ceramic material, is held stationary in the portion of cover part
2 which is fastened to the bottom part 1 of the vessel. A frame 6 is
disposed in bottom part 3 and may be connected to a drive unit (not shown)
for example, a pneumatic or hydraulic cylinder. Preferably, frame 6
carries a slide plate 5.
According to the invention, the frame or holder 6 is preferably equipped
with two sets of rollers 8, 9. Housing bottom 3 includes a plurality of
openings or side apertures 11, 12 which are spaced apart to correspond to
the axial spacing of the roller sets 8, 9 so both roller sets 8, 9, may
simultaneously pass through side apertures 11, 12. Frame 6 is supported by
rollers 8, 9 and moves along slide 16. Slide 16 is provided with
corresponding openings or open portions 13, 14 for opening or closing the
passage openings or side aperture 11, 12 of the housing when displaced.
According to an advantageous feature, the frame 6 and slide 16 may be
provided with bores 17, 18 alignable in a plane (see FIG. 2) for the
insertion of a connecting bolt or pin 50, although any other suitable
mechanism, for example, a driver pin, a mechanical or magnetic clutch or
the like, may also be used to produce a temporary fixed connection between
frame 6 and slide 16.
Finally, in the embodiment shown in the drawings, each of rollers 8 (left
side of the drawings) are preferably equipped with a lateral connecting
bolt 22, and in the area of the openings or side apertures 11 a
bolt-receiving receptacle 23 is provided on either side of the housing for
bolts 22. Openings or open portions 13, 14 located in the slide 16 are
preferably sloping ramps.
The slide gate valve according to the invention operates as follows:
FIG. 1 shows the slide gate in its open position, in which slide 16 closes
openings or side apertures 11, 12 and the frame is positioned so closure
plate 4 and slide plate 5 permit the flow of the melt from vessel 1. In
this position, frame 6 may be freely displaced between its terminal
positions to provide either an open or closed passage for the melt. Frame
6 moves on the rollers 8, 9 which are guided on slide 16 without risking
deviation from the sealing plane. The slide is positively guided and
requires no further safety measures.
To carry out repairs on the slide gate valve, for example, to replace slide
plate 5, frame 6 is moved by the hydraulic drive to a left hand position,
corresponding to the closing of the passage bore (See FIG. 2) and
subsequently fixedly attached to the slide 16 by the insertion of a
connecting bolt 50, into the bores 17, 18 of the frame 6 and the slide 16,
respectively, which are aligned with each other in this position. Moving
frame 6 into its right hand terminal position corresponding to FIG. 1, the
slide 16 may also be moved to its right hand terminal position, thereby
uncovering the openings or side apertures 11, 12. Following the release of
the connecting bolt, it is now again possible to move the frame 6
independently of the slide 16. By moving frame 6 to its left hand terminal
position, the frame may be taken from the housing, as the openings 11, 12
are open. The frame may be replaced or reinserted into the housing after
the replacement of slide plate 5. The insertion of the frame and the
closing of housing bottom is carried out in the inverse order.
In the embodiment shown in the drawings, the unintentional disengagement of
the frame from the housing is prevented by plug-in bolts 22 in the rollers
8 in cooperation with a corresponding bolt-receiving receptacle 23. The
removal of the frame is effected in a controlled manner initially on the
side of the roller or wheel set 9, while the distal end of the frame is
held by bolts 22 in the receptacle on its left side as shown in FIG. 3.
After attaining the position shown in FIG. 4, the frame may be removed
altogether from the housing by removing the bolts 22 or lifting the
assembly out of the bolt-receiving receptacle 23. Following replacement of
the slide plate 5, the frame may be returned into its position in the
reverse sequence.
The illustrated embodiments are shown by way of example. The spirit and
scope of the invention is not to be restricted by the preferred embodiment
.
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